Great Plains NP30A 30-foot Operator Manual - Manual (Page 52)

48 NP30A or NP40A Table of Contents Index Great Plains Manufacturing, Inc.
407-502M Table of Contents Index 2014-05-20
Raising/Lowering Applicator
When raising in the field, first turn off anhydrous flow.
See page 75.
Lift/lower procedures depend on applicator model, year
and hitch type:
• Pull-type applicators use six cylinders for lift/lower.
The lift circuit is separate from the fold circuit.
See “Raise/Lower: Pull-Type” on page 49.
• 3-point applicators rely solely on the tractor hitch.
Separate partial activation of the fold circuit is
necessary to avoid wing droop in lift.
See “Raise/Lower: 3-Point” on page 51.
• 2-point applicators rely on the tractor hitch at
applicator front, and a lift-assist cylinder circuit at rear.
Lift and fold share a remote circuit.
3-section and 2012- 5-section: Wing lock channels
must be configured to arrest fold during lift. See
“Raise/Lower: 2012- & 3-Section 2-Point” on
page 52.
2013+ 5-section: Solenoid valves provide partial “gull
wing” fold during lift. See “Raise/Lower 2013+
5-Section” on page 54.
Operate the tractor hitch in “position” or “depth” control
mode, regardless of applicator hitch type.
The lift circuits are re-phasing master-slave on pull-type
and 3-section or 2012- 2-point. See “Re-Phasing Pull-
Type Lift System” on page 50.
The applicator may be raised and lowered while folded.
Weight-Transfer Shut-Off Valve
This applies to all 3-section, all pull-type, all-3-point, and
all 2012- NP40A (3 and 5-section). The 2013+ 5-section
2-point weight transfer has no interaction with raise/
lower.
Refer to Figure 32 (depicting the valve closed on an NP3000,
which has the same weight transfer hydraulic system)
Model 2011 and later (and updated model 2010)
applicators have a shut-off valve in the weight transfer
system. This “weight-transfer shut-off valve“, when
closed, bypasses the pressure reducing valve, and
allows fold cylinders to operate at full speed. The weight-
transfer shut-off valve must be open for the weight
transfer system to operate in the field.
Equipment Damage Risk:
Do not back up when lowered. Always raise the applicator for
any reverse/backing. Backing when lowered will plug delivery
ports in knife shoes or tines, and can damage delivery and
vapor tubing.
Note: Lowering while stationary may result in lift-assist
or gauge wheels being lifted off the ground (as
depicted above). The applicator may not be at
operating depth until it is pulled forward in field
conditions.
Figure 31
Applicator Lowered, not in Ground
31522
1
5
Figure 32
Weight-Transfer Shut-Off Valve
32041